如何解决循环依赖问题？

Question

I have 3 Class Libraries, example below:

ApplicationCore (Main Class Library)

Application1 (Added Reference to ApplicationCore)

Application2 (Added Reference to ApplicationCore)

I would like to use Application 1 features in Application Core Class Library without a circular dependency issue. What is the best practice to implement features of Application1 to ApplicationCore?

Answer 1

将共享功能移至ApplicationCore或新的共享类库。

Answer 2

Another option is interfaces and dependency injection (DI).

• Create an interface in the MainClass Library. (ApplicationCore)
• Maybe have a default implementation of that interface in ApplicationCore.
• In Application1, setup the DI to user the implementation from Application1 for the interface.

In Application2 it will use the default implementation.

In Application1 it will use Application1's implementation.